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[Laboratory evaluation of retraction cords properties]
M A Muradov1, A N Ryakhovsky1, I Ya Poyurovskaya1
1Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow, Russia.
Stomatologiia
|May 31, 2016
Summary
Retraction cord diameter changes significantly with tension and wetting, with knitted cords showing greater alterations than braided types. These findings are crucial for understanding material behavior in dental applications.
Area of Science:
- Dental materials science
- Biomaterials engineering
Background:
- Dental retraction cords are essential for procedures like impression taking.
- Understanding their dimensional stability under various conditions is critical for clinical success.
Purpose of the Study:
- To investigate the impact of tension and wetting on the diameter of different dental retraction cord types.
- To quantify the dimensional changes in braided and knitted retraction cords.
Main Methods:
- Diameter measurements of retraction cords using an optical microscope (MBS-10, x10).
- Measurements were taken after applying tension and after wetting with distilled water.
- Comparative analysis of diameter changes between braided and knitted cord types.
Main Results:
- Cord diameter decreased after tension and increased after wetting.
- Knitted cords exhibited more significant diameter changes (53%, 48%) under tension compared to braided cords (31%, 37%).
- Wetting knitted cords increased their diameter by 13% (size 00) and 15% (size 1), while braided cords showed minimal change.
Conclusions:
- The type of cord weaving (braided vs. knitted) significantly influences its response to tension and wetting.
- Knitted retraction cords demonstrate greater dimensional variability, which may have clinical implications.
- Material properties and weaving techniques are key factors in retraction cord performance.
